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Rep. Gabrielle Giffords’ condition improved to serious on Sunday after procedures to remove a ventilator were successful.

Doctors decided to upgrade her from critical because the tracheotomy done a day earlier went well, and Giffords was breathing on her own, hospital spokeswoman Katie Riley said.

Giffords was one of 19 people shot at a Safeway store Jan. 8. Six people were killed.

Meanwhile, a week after the Tucson supermarket massacre, a shooting victim became distraught during a televised town hall meeting and was arrested, authorities said.

James Eric Fuller, a self-described liberal and military veteran, started ranting at the end of the program. He took a picture of a local tea party leader and yelled “you’re dead” before calling others in the church a bunch of “whores,” authorities said.

Deputies arrested him and called a doctor. They decided he should be taken to a hospital for a mental evaluation, said Pima County sheriff’s spokesman Jason Ogan said.